Should fix the input item leak error when quitting VLC.

We have been able to autodetect this for ages

macosx: Remove VLCEmbeddedDetachedVout because it's not used. (Or at leat doesn't bring more than its superclass).

Fixes #1684.

This reverts commit 49776bde.

the help of thedj)
Clean up.

month old)

Fixed scale loading conditions.

changes except a few more return checks)

In some error cases p_block will have been freed before p_block is
dereferenced.
Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>

with #1488)